Butterfly valve types and their characteristics

  Many types of butterfly valve



1. Classified according to structure



(1) Center Seal Butterfly Valve



(2) single eccentric valve seal coal



(3) The double eccentric butterfly valve seal



(4) three eccentric valve seal stamp



2. According to the sealing surface material classification



(1) soft sealing butterfly valve.



1) Sealing materials from non-metallic soft non-metallic soft material composition.



2) Sealing materials from non-metallic rigid metal soft material composition.



(2) metal hard seal butterfly valve. Sealing materials from metal to metal hard hard material composition.



3. By sealing the form of classification



(1) Mandatory sealed butterfly valve



1) Flexible seal butterfly valve. Seal than the pressure valve is closed by a valve plate extrusion seat, valve seat or valve plate flexibility generated.



2) plus torque seal butterfly valve. Seal than the pressure applied on the valve shaft by the torque generated.



(2) pressurized seal butterfly valve. Seal than the pressure from the valve seat or valve plate sealing component parts of the shell filling pressure generated.



(3) self-sealing valve. Seal pressure than the pressure from the media generated automatically.



4. Classified according to working pressure



(1) vacuum valve. Working pressure lower than the standard heap of atmospheric calendar butterfly.



(2) low pressure valve. Nominal pressure PN <1.6MPa of the butterfly.



(3) medium-pressure valve. Nominal pressure PN is 2.5 - 6.4MPa of the butterfly.



(4) high-pressure disc valve. Nominal pressure PN of 10. 0 - 80.0MPa the butterfly.



(5) ultra-high pressure valve. Nominal pressure PN> 100MPa of the butterfly.



5. By Operating Temperature Classification



(1) high-temperature valve. t> 450C of the butterfly valve



(2) temperature disc valve. 120C <t <450C of the butterfly valve



(3) at room temperature valve. A 40C <t <; 120C of the butterfly valve



(4) low-temperature valve. 1 100 <t <1 40C of the butterfly valve



(E) ultra-low-temperature valve. t <a 100C of the butterfly valve



6. Classified according to connection



(1) clip-on butterfly.



(2) flange type butterfly valve.



(3) supporting lug type butterfly valve.



(4) Welding-type butterfly valve. 

  

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